net: phy: mdio-mvusb: select MDIO_DEVRES in Kconfig

PHYLIB is not selected by the mvusb driver but it uses mdio devres
helpers. Explicitly select MDIO_DEVRES in this driver's Kconfig entry.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 1814cff2 ("net: phy: add a Kconfig option for mdio_devres")
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/Kconfig

@@ -194,6 +194,7 @@ config MDIO_MSCC_MIIM
 config MDIO_MVUSB
 	tristate "Marvell USB to MDIO Adapter"
 	depends on USB
+	select MDIO_DEVRES
 	help
 	  A USB to MDIO converter present on development boards for
 	  Marvell's Link Street family of Ethernet switches.